1 /* 2 * Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without modification, 5 * are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, this list of 8 * conditions and the following disclaimer. 9 * 10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 11 * of conditions and the following disclaimer in the documentation and/or other materials 12 * provided with the distribution. 13 * 14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific prior written 16 * permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _LOS_DEVICELIMIT_H 32 #define _LOS_DEVICELIMIT_H 33 34 #include "los_typedef.h" 35 #include "los_list.h" 36 #include "vfs_config.h" 37 38 #ifdef __cplusplus 39 #if __cplusplus 40 extern "C" { 41 #endif /* __cplusplus */ 42 #endif /* __cplusplus */ 43 44 #define DEVLIMIT_ACC_MKNOD 1 45 #define DEVLIMIT_ACC_READ 2 46 #define DEVLIMIT_ACC_WRITE 4 47 #define DEVLIMIT_ACC_MASK (DEVLIMIT_ACC_MKNOD | DEVLIMIT_ACC_READ | DEVLIMIT_ACC_WRITE) 48 49 #define DEVLIMIT_DEV_BLOCK 1 50 #define DEVLIMIT_DEV_CHAR 2 51 #define DEVLIMIT_DEV_ALL 4 /* all devices */ 52 53 #define DEVLIMIT_ALLOW 1 54 #define DEVLIMIT_DENY 2 55 56 #define ACCLEN 4 57 58 struct SeqBuf; 59 typedef struct TagPLimiterSet ProcLimitSet; 60 61 enum DevLimitBehavior { 62 DEVLIMIT_DEFAULT_NONE, 63 DEVLIMIT_DEFAULT_ALLOW, 64 DEVLIMIT_DEFAULT_DENY, 65 }; 66 67 typedef struct DevAccessItem { 68 INT16 type; 69 INT16 access; 70 LOS_DL_LIST list; 71 CHAR name[PATH_MAX]; 72 } DevAccessItem; 73 74 typedef struct ProcDevLimit { 75 struct ProcDevLimit *parent; 76 UINT8 allowFile; 77 UINT8 denyFile; 78 LOS_DL_LIST accessList; // device belong to devicelimite 79 enum DevLimitBehavior behavior; 80 } ProcDevLimit; 81 82 VOID OsDevLimitInit(UINTPTR limit); 83 VOID *OsDevLimitAlloc(VOID); 84 VOID OsDevLimitFree(UINTPTR limit); 85 VOID OsDevLimitCopy(UINTPTR dest, UINTPTR src); 86 UINT32 OsDevLimitWriteAllow(ProcLimitSet *plimit, const CHAR *buf, UINT32 size); 87 UINT32 OsDevLimitWriteDeny(ProcLimitSet *plimit, const CHAR *buf, UINT32 size); 88 UINT32 OsDevLimitShow(ProcDevLimit *devLimit, struct SeqBuf *seqBuf); 89 UINT32 OsDevLimitCheckPermission(INT32 vnodeType, const CHAR *pathName, INT32 flags); 90 91 #ifdef __cplusplus 92 #if __cplusplus 93 } 94 #endif /* __cplusplus */ 95 #endif /* __cplusplus */ 96 #endif /* _LOS_DEVICELIMIT_H */ 97